/* =================================================================
   Asistente de Sesiones de Aprendizaje V-2.0 | ESTILO DEFINITIVO
   Tema "Azul Cristalino" por Gemini (Azul Oscuro, Turquesa, Blanco)
   ================================================================= */

/* 1. VARIABLES DE COLOR Y ESTILOS GLOBALES
   ================================================================= */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

:root {
    /* Paleta de colores final: "Azul Cristalino" */
    --bg-color: #0B132B; /* Azul oscuro, profundo y profesional */
    --primary-accent: #33d9b2; /* Turquesa vibrante y limpio */
    --border-color: #1C2541; /* Azul intermedio para bordes y paneles */
    --text-color: #F8F9FA; /* Texto principal (casi blanco) */
    --text-muted: #8D99AE; /* Texto secundario (gris azulado claro) */
    --glass-bg: rgba(28, 37, 65, 0.6); /* Panel translúcido sutil */
    --glow-color-primary: rgba(51, 217, 178, 0.3);
    --font-family: 'Poppins', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    /* Fondo limpio y sólido, sin patrones ni líneas */
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
    transition: background-color 0.3s ease;
}

/* 2. ENCABEZADO Y PIE DE PÁGINA
   ================================================================= */
.main-header {
    text-align: center;
    margin-bottom: 2rem;
    animation: fadeInDown 1s ease-out;
}

.main-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: 1px;
}

.main-header p {
    font-size: 1.1rem;
    color: var(--primary-accent);
    font-weight: 400;
}

.main-footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    width: 100%;
    max-width: 900px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 3. LAYOUT PRINCIPAL Y PANELES
   ================================================================= */
.main-container {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.config-panel, .results-dashboard {
    background: var(--border-color); /* Fondo de panel un poco más claro que el body */
    border: 1px solid #2a3659;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    animation: fadeInUp 1s ease-out;
    transition: all 0.3s ease;
}

.panel-header {
    margin-bottom: 2rem;
    text-align: center;
}

.panel-header .step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary-accent);
    color: var(--bg-color);
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.2rem;
    margin-right: 0.75rem;
    border: none;
    box-shadow: 0 0 15px var(--glow-color-primary);
}

.panel-header h2 {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
}
.panel-header p {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* 4. FORMULARIO DE CONFIGURACIÓN
   ================================================================= */
.session-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 2rem;
}

.session-form label {
    font-weight: 500;
    color: var(--text-muted);
    grid-column: 1 / -1;
    margin-bottom: -1rem;
    font-size: 0.9rem;
}

.session-form input[type="text"],
.session-form select,
.session-form .start-generation-btn {
    grid-column: 1 / -1;
}

.session-form #nivel,
.session-form #grado,
.session-form #area-curricular,
.session-form #competencia,
.session-form #duracion-sesion,
.session-form #instrumento-evaluacion {
    grid-column: auto;
}

input[type="text"],
select,
textarea {
    background-color: var(--bg-color);
    border: 1px solid #2a3659; 
    border-radius: 8px;
    padding: 12px 15px;
    color: var(--text-color);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: all 0.3s ease;
    width: 100%;
}

input[type="text"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 8px var(--glow-color-primary);
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2333d9b2' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.7rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

select:invalid { color: var(--text-muted); }
::placeholder { color: var(--text-muted); opacity: 0.7; }
select option { background: var(--border-color); color: var(--text-color); }

/* 5. BOTONES PRINCIPALES
   ================================================================= */
button {
    border: none;
    border-radius: 8px;
    padding: 14px 28px;
    font-family: var(--font-family);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--bg-color);
}

.start-generation-btn, .download-btn {
    background-color: var(--primary-accent);
    box-shadow: 0 4px 15px 0 rgba(51, 217, 178, 0.2);
    width: 100%;
    margin-top: 1rem;
}

.start-generation-btn:hover, .download-btn:hover {
    transform: translateY(-2px);
    background-color: #29bba0; /* Tono de turquesa ligeramente más oscuro para hover */
    box-shadow: 0 6px 20px 0 rgba(51, 217, 178, 0.3);
}

/* 6. PANEL DE RESULTADOS
   ================================================================= */
.generation-log {
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: var(--bg-color);
    border-left: 4px solid var(--primary-accent);
    color: var(--text-muted);
    font-style: italic;
    border-radius: 4px;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.output-container {
    padding: 1.5rem;
    border: 1px dashed #2a3659;
    border-radius: 8px;
    min-height: 100px;
    transition: all 0.3s ease;
}

.output-container.full-width {
    grid-column: 1 / -1;
}

.output-container h3 {
    color: var(--primary-accent);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* 7. BLOQUE PEDAGÓGICO (CNEB)
   ================================================================= */
.pedagogy-block {
    border: 1px solid var(--primary-accent);
    background-color: rgba(51, 217, 178, 0.05);
}

.pedagogy-block h3 {
    font-size: 1.5rem;
    text-align: center;
    border-bottom: none;
    margin-bottom: 1.5rem;
}

.pedagogy-block h4 {
    color: var(--text-color);
    font-weight: 600;
    margin-top: 1rem;
}

.pedagogy-block h5 {
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.25rem;
}

.pedagogy-block ul {
    list-style: none;
    padding-left: 0;
}

.pedagogy-block li {
    position: relative;
    padding: 0.5rem 0 0.5rem 1.25rem;
    margin-bottom: 0.5rem;
}

.pedagogy-block li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 1rem;
    width: 6px;
    height: 6px;
    background-color: var(--primary-accent);
    border-radius: 50%;
}


/* 8. MENSAJES DE GENERACIÓN Y ANIMACIONES
   ================================================================= */
.gemini-generating-message {
    color: var(--primary-accent);
    font-style: italic;
    font-weight: 500;
    padding: 2rem 0;
    text-align: center;
    background-color: rgba(51, 217, 178, 0.05);
    border-radius: 8px;
    margin-top: 1rem;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0% { opacity: 0.7; }
    50% { opacity: 1; }
    100% { opacity: 0.7; }
}

@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

/* =================================================================
   9. DISEÑO ADAPTABLE PARA MÓVILES (MEDIA QUERIES) - INTOCABLE
   ================================================================= */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .main-header h1 {
        font-size: 2rem;
    }

    .config-panel, .results-dashboard {
        padding: 1.5rem;
    }

    .session-form {
        grid-template-columns: 1fr;
    }

    .session-form input[type="text"],
    .session-form select,
    .session-form #nivel,
    .session-form #grado,
    .session-form #area-curricular,
    .session-form #competencia,
    .session-form #duracion-sesion,
    .session-form #instrumento-evaluacion {
        grid-column: 1 / -1;
    }
    
    .panel-header h2 {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 0.5rem;
    }
}